这两个的解决思路都是要在下面这个方法中先拦截相应的url，再单独处理

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;

支付宝拦截到的url样式如下：

支付宝：alipay://alipayclient/?{"dataString":"h5_route_token="bf7ace48916875f26c94fba6f62226ef"&is_h5_route="true"","requestType":"SafePay","fromAppUrlScheme":"alipays"}
微信：weixin://wap/pay...

具体代码如下：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    NSURL *URL = navigationAction.request.URL;
    NSString * urlStr = [[URL absoluteString] stringByRemovingPercentEncoding];
    if ([urlStr containsString:@"weixin://wap/pay"] || [urlStr containsString:@"alipay://alipayclient"]) {
        [[UIApplication sharedApplication] openURL:navigationAction.request.URL];
        
        decisionHandler(WKNavigationActionPolicyCancel);
    }
    else{
        //  在发送请求之前，决定是否跳转
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

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